Accessories for Installation of Saddle Matrices. High-Quality Stainless Steel Standard Ring to be used with Forceps. Tines of the ring are narrowed. WARNING!!! When operating with ring: 1) make sure of the integrity of the ring and absence of rust on it. 2) avoid high-speed opening. 3) open the ring for not more than 10 - 12 mm width. 4) open the ring for necessary width outside the mouth before placing it on a tooth.